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Examines the industry structure and competitive strategy of Coca-cola and Pepsi over 100 years of rivalry. New challenges of the 21st century included boosting flagging domestic cola sales and finding new revenue streams. Both firms also began to modify their bottling, pricing, and brand strategies. They looked to emerging international markets to fuel growth and broaden their brand portfolios to include noncarbonated beverages like tea, juice, sports drinks, and bottled water. For over a century, Coca-Cola and Pepsi-Cola had vied for the "throat share" of the world's beverage market. The most intense battles of the cola wars were fought over the $60 billion industry in the United States, where the average American consumes 53 gallons of carbonated soft drinks (CSD) per year. In a "carefully waged competitive struggle," from 1975 to 1995 both Coke and Pepsi had achieved average annual growth of around 10% as both U.S. and worldwide CSD consumption consistently rose. This cozy situation was threatened in the late 1990s, however, when U.S. CSD consumption dropped for two consecutive years and worldwide shipments slowed for both Coke and Pepsi. The case considers whether Coke's and Pepsi's era of sustained growth and profitability was coming to a close or whether this apparent slowdown was just another blip in the course of a century of enviable performance. A rewritten version of an earlier case by Michael E. Porter and David B. Yoffie.

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